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3 years ago

What processes shape the surface of the land?

2 answers:

7 0

Erosion by water and wind.
Volcanoes produce lava.
Continental plates colliding create mountains or can create subduction zones.

bogdanovich [222]3 years ago

6 0

Erosion by water and earthquakes

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suppose you mix food coloring in water to make it blue. Have you made a solution or suspension. Explain........PLZ HELP

vagabundo [1.1K]

It would be a solution because it dissolved in the water obviously turning it blue .water dissolves so many solutions that it is often called the "universal solvent".

8 0

3 years ago

(1 point) Hydrogen fluoride (HF) has a lower molecular weight compared to hydrogen chloride (HCl), yet its boiling temperature i

Setler79 [48]

Answer:

The correct option is: D. Two types of secondary (or intermolecular) bonding are present between hydrogen fluoride molecules, whereas only one type of secondary bonding is present between hydrogen chloride molecules

Explanation:

Boiling point of a chemical substance depends on the molecular mass and the intermolecular forces, which are the interactive forces present between chemical species

1. The molecular mass of hydrogen fluoride (HF) is less than hydrogen chloride (HCl).

2. But the intermolecular forces present between the HF molecules are stronger than the intermolecular forces present between the HCl molecules.

This is because hydrogen fluoride exhibits two types of intermolecular forces: strong hydrogen bonding and dipole-dipole interactions. Whereas, hydrogen chloride exhibits only one type of intermolecular force i.e. dipole-dipole interactions.

Therefore, as a net result, the boiling point of HF is higher than the boiling point of HCl.

3 0

3 years ago

Which of the following best describes the main function of the nervous system?

Svetach [21]

C, because the nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.

7 0

3 years ago

A 25. 00 ml sample of acetic acid containing phenolphthalein indicator is titrated with 0. 1067 m naoh. The solution changes col

sasho [114]

The concentration of acetic acid:

The concentration of the acetic acid before titration is 0.128 M

What is titration?

Titration is a quantitative analytical procedure that works by allowing a known analyte to gradually react with a titrant until an endpoint is reached.

Titration for weak acid and strong base:

Moles of acetic acid = moles of NaOH

Given:

Concentration of NaOH = 0.1067 M

Volume of NaOH = 30.07 ml = 0.03007 L

Calculation:

So, by using the formula, Concentration = Moles/Volume

Moles of NaOH = concentration x volume = 0.1067 x 0.03007 = 0.0032

Therefore, the moles of acetic acid = 0.0032 mole

Now, using the formula again for determining the concentration of acetic acid, we get,

Concentration = Moles/Volume

Concentration of acetic acid = 0.0032/0.025 = 0.128M

Learn more about titration here,

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7 0

2 years ago

Why are all molecules not compounds?

Elena-2011 [213]

Answer:

Explanation:

All compounds are molecules, but not all molecules are compounds. That is because a molecule can be made up of two atoms of the same kind, as when two oxygen atoms bind together to make an oxygen molecule. However, all compounds are made up of two or more different types of atoms.

3 0

3 years ago

Read 2 more answers